> > fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > > address: 00:02:55:30:54:28 > > media: Ethernet autoselect (100baseTX full-duplex) > > status: active > > inet 192.168.1.1 netmask 0xffffff00 broadcast 192.168.1.255 > > inet6 fe80::202:55ff:fe30:5428%fxp0 prefixlen 64 scopeid 0x1 > > xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > > address: 00:01:02:78:11:e8 > > media: Ethernet autoselect (10baseT) > > status: active > > inet 203.219.167.126 netmask 0xfffffffc broadcast > > 203.219.167.127 > > inet6 fe80::201:2ff:fe78:11e8%xl0 prefixlen 64 scopeid 0x2 > > > > For fxp0, the internal interface although the nic can do full-duplex > > it > > seems to me that it is only running simplex!! > > Why do you think it is running simplex. I read the above and see > where it says "(100baseTX full-duplex)" > > I don't think 10BaseT can run full duplex. I could be wrong but > I don't think so. > > But why does it matter? A single VOIP connection will not even > use 1% of a simplex 10BaseT. Simplex 100BaseT should be able > to handle dozens and dozens of calls
Just for fun, I moved our * box to a 10meg al-cheapo hub to force 10-half, placed a sip-to-sip call (via two C7960's) and noticed audio was very much half duplex. Very irritating to say the least (worse then most digital cell-to-cell calls). Then without changing anything other then moving the * interface to an upstream switch running 100 full (and verifying settings), the half-duplex-sounding audio effects completely disappeared (as expected). While both tests were being conducted, I ran a Sniffer analyzer to monitor packets and validate results. 10-half vs 10-full does have a substantial impact on quality. Moving from 10-full to 100-full would have no impact unless I could have loaded it with more rtp sessions then what I currently have the ability to do. And, FWIW, an interface set to half-duplex on one end with full-duplex on the other end was by far worse then when both ends of the cat 5 matched. All tests were conducted by forcing rtp traffic "thru" * (didn't allow the rtp to flow between the two sip phones). BTW, 10-Full setting is truly available on a large number of NICs, but not all. Obviously, the older stuff didn't support it, nor do the older Cisco 10 meg interfaces, etc. _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users